rosebush



' W. E. BOSEBUSH. BARREL FASTENING FOR FIREARMS.

APPLICATION FILED SEPT. 10. 1918.

Patented Sept. 16, 1919.

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w. E. RO SEBUSHQ BARREL FASTENING FOR-FIREARMS.

APPLICATION FILED SEPT. 10. 1918;

Patented Sept. 16, 1919.

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WALDO E. ROSEIBUSH, or APrLETon", WISCONSIN.

BARREL-FASTENING FOR Specification of Letters Patent. Patented Sept. I6,1919.

Original application filed November 19, 1917, Serial No. 202,747.Divided and this application filed September 10, 1918.

To all whom it may concern:

Be it known that I, lVALDo E. RosEBUsrr, a citizen of the United States,and a resident of Appleton, in the county of Outagamie and State ofWisconsin, have invented a new and Improved Barrel-Fastening forFirearms, of which the following is a full, clear, and exactdescription, this being a division of the application Serial No. 202,747 for a firearm, filed by me on November 19, 1917.

The invention relates to recoil operated breech loading hand firearmssuch as shown and described, for instance, in the application forLetters Patent of the United States, Serial No. 117,660, filed by me onAugust 30, 1916.

The object of the invention'is to provide a new and improved barrelfastening for firearms arranged to permit-the user to-conveniently andquickly remove the barrel from the barrel receiver for repairs of thebarrel or for using barrels of different sized bores on the samefirearm. Another object is to force the breech block automaticallyrez-irwardly when disassembling the parts to cause the-extractor toclear the barrel and thereby permit removal of the barrel from thebarrel receiver without completely disengaging the barrel receiver fromthe main frame.

fith these and other objects in view, the

invention consists of novel features of construction as hereinaftershown and described and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a side elevation of the firearm with parts shown in section;

Fig. 2 is a perspective view of the barrel;

Fig. 3 is a perspective view of the barrel receiver;

Fig. 4 is a cross section of the firearm on the line 44 of Fig. 1;

Fig. 5 is a similar view of the same with the barrel in unlockedposition ready for removal from the barrel receiver; and

Fig. 6 is a perspective view of the main frame.

The main frame 40 of the firearm is provided at its forward end withintegral halfround pivots 43 adapted to be engaged by correspondinglyshaped notches 44 formed Serial No. 253,476.

in the sides 45 of a barrel receiver 46 to permit of swinging saidbarrel receiver 46 into and out of position on the main frame 40 mounted011 the said frame against acci- Z dental displacen'ient. The barrelreceiver 46 is provided with, a central bore 47 into barrel .49 providedwith a shoulder 50 abutting against the forward end of the barrelreceiver 46, as plainly indicated in'the'drawings. The reduced portion48 of the barrel 49 is provided 011 the top and bottom with two sets ofspaced lugs 51 and 52 adapted to pass through longitudinal recesses 53formed in the side walls of the bore 47 of the barrel receiver 46., andthe said lugs 51 and 52 are adapted to register with transverse recesses54 and 55 formed in the top and bottom of the wall of the bore 47 Inplacing the barrel 49 in position on the barrel receiver 46 the lugs 51and 52 are in register with the longitudinal recesses 53 to permit ofpassing the reduced portion 48 which fitsthe reduced rear end 48 of thei of the barrel into the bore 47 until the 52 are in register with therecesses 54 and A- quarter turn is now given to the barrel so that thelugs 51 and 52 pass into the recesses 54 and 55 thus locking the barrelagainst longitudinal displacement in the barrel receiver 46 (see forcomparison Figs. 4 and 5). The rear end of the reduced portion 48 of thebarrel 49 is flush with the rear end of the barrel receiver 46 and isprovided at the bottom with a beveled lug 60 fitting into a notch 61formed in the top of a lug 62 which is an integral part of the mainframe 40, as plainly shown in Fig. 6. It will be noticed that by the lug60 en gaging the notch 61 the barrel 49 is held against accidentalturning when the parts are assembled and the firearm is in use. Thebarrel 49 is provided withthe usual bore 63.

On the barrel receiver 46 is mounted to slide forward and backward abreech block 70 normally held in a forward position by the action of abreech block spring 80, as more fully described in the application abovereferred to. The rear ends of the sides 45 of the barrel receiver 46 arelocked in place by the use of a back strap 100 fitting into a recess inthe back of the handle 41 of the I end of the back strap 100 is pivotedat 101 to the handle 41 and the upper end of'the said back strap isprovided with forwardly extending lugs 102 fitting the sides of the mainframe 40 and terminating in catches 103 engaging shoulders 104 formed onthe rear edges of the sides of the barrel receiver 46 thus holding thebarrel receiver locked in position at its rear end. Then it is desiredto remove the barrel 49 from the barrel receiver 46 the operator swingsthe back strap 100 rearwardly to disengage the catches 103 from theshoulders 104 and swing the breech block 70 slightly upwardly. Thebarrel 49 can now be removed from the barrel receiver 46 by giving thebarrel a quarter turn to disengage the lugs 51 and 52 from the recesses54 and to move the said lugs into the recesses 53 to permit the reducedend 48 of the barrel to slide out of the bore 47 on pulling the barrel49 in a forward direction.

From the foregoing it will be seen that by the arrangement described,the barrel 49 can be removed from the barrel receiver 46 withoutdisengaging the latter from the main frame. If desired, however, thebarrel receiver 46 with the barrel 49 and the breech block 70 mountedthereon can be completely disengaged from the frame 41 in the mannermore fully set forth in the application above referred to. It isunderstood that the parts can be readily assembled in reverse order andthe barrel locked in place in the receiver and the latter locked inposition by the back strap 100.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent 1. In a handfirearm, the combination of a barrel having a reduced rear portion and ashoulder at the forward end of the reduced portion, the latter beingprovided exteriorly with lugs, a barrel receiver having a bore intowhich fits the said reduced end of the barrel, the said barrel shoulderfitting against the forward end of the barrel receiver, the forward endof the wall of the bore of the said barrel receiver having longitudinalrecesses for the passage of the said barrel lugs, and the wall of thebore of the said barrel receiver having transverse recesses intersectingthe longitudinal recesses and being engagedby the said barrel lugs and aframe on which the said barrel receiver is mounted to swing up and down,the said frame having a lug provided on top with a notch and the rearend of the said barrel having a rearwardly projecting lug engaging thesaid notch.

2. In a hand firearm, the combination of a barrel provided peripherallywith locking lugs and having a locking lug pro]ecting lengthwise at itsrear end, a frame having a notch adapted to be engaged by the saidlengthwise projecting locking lug, and a barrel receiver mounted on thesaid frame and having a bore into which fits the portion of the barrelhaving the said peripheral locking lugs, the wall of the bore havinglongitudinal recesses for the passage of the said peripheral lockinglugs and having transverse recesses for the peripheral locking lugs, topass into to lock the barrel to the receiver.

WALDO E. ROSEBUSH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

. Washington, D. G.

